Telephone-call register



May 15, 1923.

1,455,268 B. SAPIENZA TELEPHONE CALL REGISTER Filed March 1922 26 F e K r T1LT E Q 42 K i mm H za M /5 INVENTOR A'I'YURNEY Patented May 15, 1923.

UNITED STATES PATENT OFFICE.

BENEDE'ITO SAPIENZA, NEW YORK, N, Y.

TELEPHONE-CALL REGISTER Application tiled March 7, 1922.

been received during the absence of the pci= son who is authorized to receive such calls.

The above and other objects will become apparent in the description below in which like characters of reference refer to the likenamed parts in the drawing.

Referring briefly to the drawings, Figure 1 indicates a top plan view of the apparatus with a part of the casing torn away to expose the mechanism within.

Figure 2 represents a sectional side (lQVil' tional View of the same and is taken on the line 2-2 of Figure 1.

Figure 3 is a similar sectional view taken on the line 3-3 of Figure 1.

Figure 4 is a diagrammatic representation of a telephone set with the registering apparatus connected thereto on an auxiliary circuit.

Describing the drawing more in detail and taking the wiring diagram into consideration, as represented in Figure 4, the numeral indicates a transmitter and 11 a receiver of=a common type of telephone which is universally used for the conveyance of the sound waves. Both transmitter and receiver are connected in parallel to the main lead wires 12 and 13. The usual primary and secondary induction coils 14 and 15 respectively, together with a receiver book 16, a condenser 17 and :i ringer 18 are all installed in the circuit in proper relation to one another and are \\'Qll-l(nu\\'n to those skilled in the art. As the apparatus requires no change in the wiring of the telephone set, the function, use and description of the latter has been obviously treated with brevity taking into consideration and can merating the most essential members only. for the proper identification thereof.

The register is connected in series to a Serial No. 541,748.

wire 19 which is tapped 03 from the ringer circuit and has its opposite end 20 grounded. This auxiliary circuit to which the,appara tus is connected, is completed by a wire 21, one end 22 being grounded while the other; end joins the main lead wire 12. Said wire 21 is provided with a battery 23 ,for energizing the auxiliary circuit and cutout switch 24.

The register is connected inseries to the auxiliary circuit and essentially comprises a rectangular hollow casing in the corners of which are formed lug 26 by which thc. .device can be secured to a wall. The undeizside of the casing is entirely open and .has a cover plate 27 secured thereon in a suitable manner. A spindle member 28 journalled in the wall of said casing, projects rearward so that the pointed end thereof is rotatably received in a pivot bearing 29 fixed to the rear plate 27. The exterior projecting end of the spindle 28 has a knurled thumb knob 30 which is provided for rotation of the spindle for the purpose, of resetting the dial after the latter has been rotated.

Spindle 28 has a dial 31 secured thereto adjacent the wall 25 of the casing. A radially formed orifice 32 in the casing wall exposes the dial face 33 to view so that the numerals 34 on said face can be read'thru the orifice from an appreciable distance.

An annular disk 35 fixedly mounted on spindle 28 adjacent to the dial. has a plurality of equally spaced notches 36 which are engaged by a lever 37 pivoted a: .38. This lever 37 has a downwardly extending angle lar arm 39 having a slot which engages a pin 40 fixed to a plunger 41. Said plunger is slidable within the core of an clertro magnet 42 and has a tapered head 43 at one end which is adapted to engage the notches 36 on the disk 35, when the lever 37 has been released from one of the notches thru the action of the electromagnet. A spring 44 engaging the lever 37 urges the latter downwardly into engagement with the disk.

A spiral spring 45 between the plate and the disk has its outer and secured to the lat ter hy a screw 46 and the inner end is secured 'to the pivot hearing 29. This spring is pro vided for rotating the disk for a urpose which will be more fully hereinai tcr de scribed.

In use the apparatus is first set so that the zero on face 33 of the dial 31 is visible thru the orifice 32. As the switch located at the central station and designated by 24 is elosed, ringer 18 will signal that a call is waiting to be answered. The auxiliary circuit formed by wires 12, 19 and 21 is simultaneously closed, thus energizing the electromagnet 42 which slides the plunger 41 in the direction of the disc. In so doin lever 37 is rotated out of engagement with t e notch 36 permitting the spring to rotate the dial in a counter clockwise direction. The plunger head 43 will engage the nearest notch and check the rotation of the said dial centrally of its travel. so as to prevent the dial from receiving uncontrollable momentum, and also to permit rotation to the next number only, irrespective of the time the electromagnet remains energized. Obviously. as each additional call is received the operation is repeated, and the total number thereof will be registered by the numeral showing thru the orifice 32. \rVhen the number of calls received has been noted, dial 31 is rotated or reset by rotating the knurled thumb knob 30 until the zero numeral appears visible thru the orifice 32, after which the apparatus is preparedlto register additional calls.

The person to whom the telephone calls have been sent. during his absence will see at a glance the number of calls received. It should be understood that the central station has inquired and received the call numbers of the persons who have phoned so that when the absent person returns each of the phone numbers can be obtained by asking for same at the central station.

I claim:

1. A call telephone register comprising a casing. a spindle rotatable in said casing, a numbemd dial, and a notched disk secured to said spindle, a pivoted lever engaging the notches having an angularly extending arm, an electromagnet, a plunger slidable in said electroqnagnct, said plunger being connected with and adapted to release the lever from engagement with the notches of said disks to permit rotation of the same, upon its forward movement, the end of said plunger making contact with the periphery of said disc. and lllt':\llS f r rotating the dial upon the. release of said (list).

2. A call telephone ieg' lcr comprising a casing member. a spindle gi otatnble in said easing.'a dial and notched disk mounted thereon, a pivoted lever having a detent engageablc with the nolchcs of said disk, an angularly extending arm on said lover, a spiral spring having its outer end secured to the disk and its inner end fixed to the spindle bearing. said spring being adapted to rotate said disk when released by the lever, an

electro-niagnct, a plunger slidable in the electro-nnlgnct loosely en aging the lever arm, said elcctroanagnet iieing adapted to actuate the lever and disenga e the same from the notches of said disk w \en the electro-inagnct is energized, and a point on said plunger adapted to ride on the periphery of said disk and engage in the notches therein when a forward position.

In witness whereof I ailix my signature.

BEN EDETTO SAPIENZA. 

